P240BEVAP System Leak Detection Pump Heater Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P240B covers a heater control line of the leak detection pump that is held at too low a voltage, which in practice means a short to ground on the wire or inside the module. Per VW's 2014 data books for the Golf and Touareg, the code appears when the heater signal falls below roughly 2.74-3.26 V. Land Rover lists P240B-00 in SSM71298 (LR4, Range Rover Sport L320) and SSM69118 (Range Rover L405, Range Rover Sport L494) and, once wiring is ruled out, has the DMTL pump replaced and returned. Maserati's sheet MAS002203 includes P240B for its DMTL models from MY17 and asks for the 12 V supply and connector to be checked first. Compared with P240A the circuit is closed but grounded; P240C is the over-current case. Drivability is not affected.
- What you may notice
- Check engine light
- EVAP readiness not completed
- Likely causes
- LikelyHeater wire shorted to ground near the pump
- PossibleInternal fault in the DMTL pump module (Land Rover replaces the pump)
- RareMoisture in the connector creating a path to ground
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.